states we're learning that over the past year, the u.s. had several rounds of secret talks with iran without talking to alies. the deal is only temporary >> reporter: president obama announced the historic agreement that would scale back iran's nuclear program >> it would help prevent us from building a nuclear weapon. they cut off the path >> iran wants to enrich for for nuclear power according to them. negotiations ran through the night. in the end, iran agreed to limit its stockpiles and scale back nuclear activity >> it's important that all of us see the opportunity to end the unnecessary crisis and offer new horizons >> reporter: in exchange, they will ease some of the crisis. this is only the first step >> the next phase, let me be clear, it will be more difficult and we need to be honest about it. >> all sides will try to reach a long-term deal. they called deal a historic mistake. >>> what incentive does the regime has to take serious steps that actually dismantle its nuclear weapons capabilities? why would it dismantle it? none of